Yeah, I don't support Metallica in any sense of the word, but the difference there was no one was profiting in lue of Metallica, thats like me taking a unreleased album, putting up a website saying I'm Metallica and selling that album to people. Its a little different.
Profit or not its the same principle. Metallica didn't want their product fished our for free. Was profit made on it by Napster, probably not, but its still distribution of other peoples product.